Pipe-threading die



,1926. 12 w. E. GLASPEY ET AL PI PE THREADING DIE Filed Nov. 2, 1922 4Sheets-Sheet 1 Jan. 12 1926.

W. E.' GLASPEY ET AL PIPE THREADING DIE Filed Nov. 2, 1922 4Sheets-Sheet 2 Jan. 12 Q 1926. 1,569,740

w. E. GLASPEY ET AL PIPE THREADING DIE Filed Nov. 2, 1922 4 Shets-Sheet5 Jan. 12 1926..

W. E. GLASPEY T AL PIPE I' l-[READING DIE Filed Nov. 2, 1922' PatentedJan. 12, 1926.

UNITED STATES PATENT OFFICE.

WARREN E. GLASPEY AND FREDEBIG COX, OE BBIEGETON, NEW JERSEY, AS-SIGNORS TO THE COX AND SONS COMPANY. OF BRIDGETON, NEW JERSEY, A COR-IORATION OF NEW JERSEY.

'ZPIPE-THREADING DIE. I

Application filed November 2, 1922. Serial No. 598,575.

To all whom it may concern:

Be it known that we, WARREN E. GLASPEY and Fnunnmo W. Cox, citizens ofthe United States, residing in Bridgeton, New Jersey, have invented aPipe-Threading Die, of which the following is a specification.

Our invention relates to pipe thrbading dies, and the principal objectof the invention is to provide novel and improved means for holding andadjusting the chasers in the die body.

In the attached drawings:

Figure 1 is a view of the assembled die;

Fig. 2 is a section on the line 22, Fig. 1;

Fig. 3 is a section on the line 3 -3, Fig. 1:

Fig. 4 is a face view of the cam controlling the chaser holders;

Fig. 5'is a view of the die body;

Fig. 6 is a view in perspective of one of the'chaser holders with itschaser;

Fig. 7 is a view in perspective of the chaser adjustin lever; I

Fig. 8 1s a view in perspective of the chaser adjusting lever pivot pin;

Fig. 9 is a view in perspective of the chaser adjusting lever operatingcam;

Fig. 10 is a fragmentary enlarged section of a portion of the dieillustrating the details of the chaser adjusting lever and associatedelements;

Fig. 11 is a section on the line 11-11, Fi 1;

Fig. 12 is a fragmentary view illustrating modification of the operatingparts;

ig. 13 is a section on the line 1313,

. ig. 14 is an end view shown in Fig 12, and

Fig. 15 is a view in perspective'of one element of the toggle shown inFig. 12.

of the fragment With reference to the drawings, the die consists of abody 1 having therein a central opening 2 and on its forward face amaintain-the chaser holders in the guide slots 4 between theprojections.

The die further comprises a cam disk 7 which in the present instance isprovided at its, periphery with a flange 8 adapted to fit around theouter edges of the projections 3, as shown in Fig. 2. Also as shown inthis latterfigure and as indicated in Fig. 5, the projections 3 aregrooved at their outer edges, these grooves 9 being provided for thereception of retaining se 'ments 10 securcd'to the inner face of thefiange 8 by set screws 11, these segments while maintaining the cam disk7 in place upon the body, in no way interfering with relative rotationof the-disk and body. The cam disk 7 is provided also with cam slots 25whose function will be described hereinafter.

The body 1 of the die has an arm 12, in theouter end of which is abearing 13, and journaledin this bearing is a sleeve 14 adapted to carrya threaded rdd 15, shown in Fig. 1. Attached to the cam disk 7 is a lug16, to which is pivotally attached a link 17 which also has pivotalconnection at 18 with the rod 15,- the said link 17 and the rod 15constituting together a toggle. The link 17 further comprises a socket19 for the reception of an operating lever 20, by means of which thetoggle may be operated. It will be apparent that operation of the togglewill result in relative rotation between the'cam disk 7 and the body 1of the die, and theslots 4 of the body 1, in which as previouslydescribed they areretained'b the plates 6. iv 7 That end of each of' theho ders 21 lying nearest the periphery of the die is rovided with athreaded aperture 22 in W ich is a stud 23, and journaled on theprojecting end of the stud is a block 24 which fits within the camgrooves 25 of the cam plate 7. It will now be a parent that rotation ofthe plate 7 upon t e body, owing to the oblique nature of the cam slots25, will effect a movement of the holders 21 in the guide slots 4 of thebody which will either advance or retract 28, aclamping bar 29 whichengages the clamping .tated in the opening.

(ill

surfaces adapted to engage the back and lateral walls of the recess 28as already stated. Opposite the said lateral bearing surface andadjacent this clamping surface is a longitudinal groove 31 having a walladjacent and at an angle to the said clamping surface. Preferably thefront longitudinally grooved cutting face of the chaser extendslaterally beyond the plane of the clamping surface as is very clearlyshown in Figs. 6 and 10. There is provided and secured to the holder bymeans of bolts 28,

before mentioned longitudinal surface on the chaser. The clamping barhas a hook portion 30 which fits the said groove 31 in the chaser. Byreason of its engagement with the clamping surface on the chaser and thewall of the groove adjacent the clam ping surface, the said clamp servesto firmly hold the chaser in its seat on the holder. It will .be notedthat the abutting surfaces'of the holder 21 and the clamp 29 arebeveled, as shown at 32 in Fig. 6, and these beveled faces are soarranged that the inner edge only of the clamp bears on the beve edsurface of the holder and the bolts 28 have a tendency both to force thechaser 27 against the beveled side 27 ofthe holder and also tightlyagainst the bottom face or base of the recess 26, whereby the chaser isheld with extren'ie tightness to its seat in the holder. p

i In each of the holders 21 there is also provided a counterboredaperture 33 adapted to receive an eccentricpin 34, the projectingeccentric end 35 of the pin being threaded for the reception of a locknut 36 and having at its extreme end and integral there with a nut 37whereby the pin may be re- The eccentric portion of the pin passesthrough a slotted aperture 38 in a lever 39, which latter is pivotallymounted on a pin 40 in the chaser holder, the lever 3!) extendingthrough a slot 41 in the holder and having at its end a tapered pin 42which enters a recess or hole in the back of the chaser 27. Rotation ofthe pin 34 by reason of the eccentricity of the portion 35 whichoccupies the opening 38 in the lever 39 effects oscillation on its pivotpin 40 of the said lever with a resultant movement of the chaser 27,while the lever and consequently the chaser may be fastened tightly tothe holder by securing the lock nut 36 which prevents rotation of thepin 34. The parts described function not only as an additional lock forthe chaser 27 in its holder, but also greatly facilitate the accurateadjustmentof the chaser in the holder. I

It will be noted that the bases of the recesses 26 of the holders whenthe latter are mounted in the die lie in planes parallel to the axis ofthe die and to the axis of a pipe inserted in the die for threading, andthat the required tapering of the thread is accomplished through atapered construction of the chasers themselves. As a consequence of thisconstruction we may employ the same holders for chasers of differenttaper. In dies of the ordinary type, it has been customary to obtain thetaper in the cut thread by a tapered construction of the holder, itbeingnecessary to employ a different set of holders for each different taper.The tapering of the chasers themselves instead of the holders not onlygreatly reduces the cost of manufacturing the die, but also facilitatesthe operation of changing chasers.

The operation of the device will be apparent. The lever 20 is shifted tostraighten the toggle 15,17 and thereby causes partial rotation of thecam disk 7 in clockwise direction, see Figure 1, with the result thatthe chasers are advanced into position ready for contact with the work.The pipe is then revolved and threaded into the die a distance equal tothe length of thread required. The lever 20 is then manipulated to breakthe toggle 1517, thereby rotating the cam disk 7 in a counterclockwisedirection, re-

tracting the chasers and allowing the die to be withdrawn from threadout. The extent of the retraction of the chaser holders is controlled byadjusting the rod 15 in the sleeve 14, such adjustment being providedfor by lock nuts 45 which normally retain the rod fixed in the sleeve.Adjustment of the chasers in their holders to bring them into conformitywith eachother is accom plished by means of the aforedescribed lever 39with its operating pin 34, this lever as before mentioned alsoconstituting an additional lock for the chasers when the die is inoperation.

In the modification illustrated in Figs. 12 to 15, the arm 16 isreplaced by an elongated lug 50 having a plurality of apertures 51;while the sleeve 14 is in this instance replaced by a sleeve 52 havingapertured lugs 53 adapted to lie on opposite sides of the lug 50 and tobe secured to thelatter lug by a bolt 54 passed through the apertures.The apertures 51 are so placed as to give settings of the diecorresponding to pipes of different (llitll'ltlQlS, whereby in settingthe die for a particular diameter of pipe, it is only necessary tosecure the sleeve to the lug 50 at the specified aperture 51. In thisinstance also,

adjustment of the sleeve 52 with respect to the rod 15 is provided for.by the aforede-' scribed nuts 45., 45,. on the threaded end of the rod.i

The operating toggle of which the constitutes an element is alsomodified by use of the element 55, 'shown in perspective in Fig. 15, andpivotally attached to the arm 12 by a bolt 56.

We claim:

1. A thread cutting die coinpris'ing in combination, a body, a chaserholder mounted on ing the groove in the chaser and engaging.

the aforesaid wall thereof.

I 2. A thread cutting die comprising in combination, a body,'a;chaserholder mounted on the body and .provided with a recesshaving back andlateral walls at an acute an- 1e to each other, a chaser formed withongitudinal cutting teeth on its front face and having longitudinal backand lateral bearing surfaces adapted to engage the walls of the saidrecess, the said chaser also having a longitudinal lateral clampingsurface opposite the said lateral bearing surface and a longitudinalgroove with a walladjacent and at an angle to the. clam ing surface, aclamp engaglng the clamping surface ofthe chaser and provided with ahook portion entering the groove in the chaser and engaging the afor aidwall thereof, and

' means engaging the clamp and tending to move it both inward andrearward to. exert pressure on the clamping surface of the chaser and.also on the ad acent wall ofthe groove. i

3. A thread cutting die com rising combination, a body, a chaser hol ermounted on the body and provided with a recess having back and lateralwalls at an acute angle to each other, the said holder also having aninclined surface adjacent the recess, a chaser formed with longitudinalcutting teeth ,on itsfront face and having longitudinal back and lateralbearing surfaces adapted to engage the walls of the said re- .cess, thesaid chaser also having a lengitudinal lateral clamping surface oppositethe said lateral bearing surfaceand a longitudinal groove with a walladjacent and at an rod; 15

angle to the clamping surface, a clamp ngag- 7 ing the clamping surfaceof the'chaser and provided' with a'hookortion entering the groove in thechaser an engaging the afore said wall thereof, the said clamp beingprovided with a heel portion having contact with the inclined surface ofthe holder at a positionscparated from the clamping sur--- face on thechaser, and m'eans for exertingpressureon the clamp between the edgeportions thereof and tending to move the clamp inward and rearward alongthe'inclined surface on the holder.

4. A chaser for a thread cutting die formed with longitudinal cuttingteeth on its front face and having longitudinal back and lateral bearingsurfaces at "an acute angle to each other, t he said chaser also havinga longitudinal lateral clamping-surface opposite the said lateralbearing surface'and a longitudinal'groove with a wall adjacent and at anangle to the clamping surface.

5. A thread cutting die comprising in. combination, a body, a chaserholder mounted on the body and having'a chaser receiving recess,a'chaser formed with'longitudinal cutting teeth .on its frontface andfitting the recess for longitudinal movement therem,

and a lever pivoted to the holder and enga ing the chaser for moving itlongitudinal y as aforesaid.

6. A thread cuttlng die compr sing in combination, a. body, a'chaserholder mount-' ed on the body and having a chaser receivin recess, achaser formed with longitudina cutting teeth on its front'face andfitting the recess for longitudinal movement therein, the said chaserhaving a holein its-back face and a-lever pivoted to'the holder andentering the holein the chaser for moving the chaser longitudinally asaforesaid.

7. A thread cutting diecom rising in combination, a body, a chaser holer mounted on the body and having a, chaser receivm recess, a chaserformed with longitudina cutting teeth on its'front face and fitting therecess for lon itudin'al movement there- I in, a lever pivote to theholder and engaging the chaser for moving it longitudinally asaforesaid, and means for locking thelever in different positions. v j

8. The combination with a holder, of achasing tool seated on the holder,,a lever pivoted-to the holder and engaging. the tool, a pin rotatablymounted in the holder and having an eccentric portion engaging thelever, and means for rotating the m to ad-- .just the position of thelever and o the chasng tool.

9. The combination with a holder, of a chasin tool seated on the holder,on apertured ever pivotally secured to the holder and en agin the. tool,a pin Iotatably mounte in t e holder and hen an eccentric portionextending through e aperture in the lever, and means for rotating thepin to shift the'lever and thereby to adjust the position of the tool onits seat.

10. The combination. with a holder, of a chasing tool seated on theholder, an apertured lever pivotally secured to the holder and engagingthe tool, a pin rotatably mounted in the holder and having an eccentricportion extending through the aperture in the lever, means for rotatingthe pin to shift the lever and thereby to adjust the poa cha'si toolseated on the holder, an aperture lever v pivotally secured to theholder and engagin the tool, a pin rotatably mounted in the hol er andhaving an eccentrio portion extending through the aperture in the lever,the said pin having a threaded portion adjacent the eccentric portion,

means for rotating the pin to shift the lever and thereby adjust theposition of the tool on its seat, and a nut on the threaded portion ofthe pin for locking the pin against rotation.

WARREN E. GLASPEY. FREDERIC W. COX.

